Preheat oven to 375 degrees F (190 degrees C) and place oven rack in the center of the oven. Line two baking sheets with parchment paper.

In a large bowl, sift together the flour, cocoa powder, baking powder, baking soda and salt

using the electric mixer, beat the butter and sugar until light and fluffy

Add egg – beating well. beat in vanilla extract

In small measuring cup, mix the buttermilk and red food coloring. with the mixer on low speed, alternately add the flour mixture and buttermilk mixture, in three additions beginning and ending with the flour.

With moistened fingers or with the back of a spoon, smooth the tops of the cookies.

Bake for about 9-10 minutes or until the tops of the cookies, when lightly pressed,spring back(or a toothpick inserted into the center of a cookie comes out clean). Remove from oven and transfer to a wire rack to cool completely.